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Note 10 - Notes and Mortgage Payable (Details Textual) - USD ($)
$ in Thousands
6 Months Ended
Feb. 28, 2023
Jun. 30, 2023
Feb. 29, 2020
Long-Term Line of Credit   $ 0  
Nonrecourse Mortages Assumed Through Consolidation [Member]      
Noncash or Part Noncash Acquisition, Debt Assumed   $ 37,200  
Number of Real Estate Properties   2  
Mortgage Relating to An Operating Property [Member]      
Repayments of Long-Term Debt   $ 12,000  
Revolving Credit Facility [Member]      
Line of Credit Facility, Current Borrowing Capacity $ 2,000,000   $ 2,000,000
Line of Credit Facility, Maximum Borrowing Capacity $ 2,750,000    
Debt Instrument, Basis Spread on Variable Rate 0.775%    
Debt Instrument, Interest Rate, Increase (Decrease) (0.02%)    
Debt Instrument, Interest Rate, Effective Percentage   5.92%  
Line of Credit [Member]      
Long-Term Line of Credit   $ 0